shrink_dentry_list

Name:shrink_dentry_list

Proto:void shrink_dentry_list(struct list_head *list)

Type:void

Parameter:

Type	Parameter	Name
struct list_head *	list

1100

When Not list_empty - tests whether a list is empty*@head: the list to test. cycle

1103

dentry = list_entry - get the struct for this entry*@ptr: the &struct list_head pointer.*@type: the type of the struct this is embedded in.*@member: the name of the list_head within the struct.(prev, structdentry, d_lru)

1104

spin_lock( & d_lock)

1105

_read_lock() - mark the beginning of an RCU read-side critical section* When synchronize_rcu() is invoked on one CPU while other CPUs* are within RCU read-side critical sections, then the* synchronize_rcu() is guaranteed to block until after all the other

1106

If Not Lock a dentry from shrink list Then

1107

bool can_free = false

1108

_read_unlock() - marks the end of an RCU read-side critical section.* In most situations, rcu_read_unlock() is immune from deadlock.* However, in kernels built with CONFIG_RCU_BOOST, rcu_read_unlock()

1109

d_shrink_del(dentry)

1110

If count < 0 Then can_free = protected by d_lock & DCACHE_MAY_FREE

1112

spin_unlock( & d_lock)

1113

If can_free Then dentry_free(dentry)

1115

Continue

1117

_read_unlock() - marks the end of an RCU read-side critical section.* In most situations, rcu_read_unlock() is immune from deadlock.* However, in kernels built with CONFIG_RCU_BOOST, rcu_read_unlock()

1118

d_shrink_del(dentry)

1119

parent = parent directory

1120

If parent != dentry Then __dput_to_list(parent, list)

1122

__dentry_kill(dentry)

**Caller**
Name	Describe
prune_dcache_sb	prune_dcache_sb - shrink the dcache@sb: superblock@sc: shrink control, passed to list_lru_shrink_walk()* Attempt to shrink the superblock dcache LRU by @sc->nr_to_scan entries
shrink_dcache_sb	shrink dcache for a superblock
shrink_dcache_parent	prune dcache
mntput_no_expire
namespace_unlock

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